CHANGING HISTOPATHOLOGICAL TRENDS OF PAROTID TUMORS: 25 YEARS OF EXPERIENCE OF 160 CASES FROM A SINGLE INSTITUTION IN JORDAN

AYMAN MISMAR¹, MOHAMMAD ALADAILEH¹, FIRAS OBEIDAT¹, MOHAMMAD AL-QUDAH¹, NADER ALBSOUL¹, ORHAN ALIMOGLU²

¹Department of General Surgery/ Faculty of Medicine/ The University of Jordan, (Amman- Jordan) - ²Medeniyet University Faculty of Medicine, General Surgery, (Istanbul, Turkey)

Background: Benign parotid tumors show a variable behavior. Our aim is to study the features of parotid neoplasms in a recent time interval and to compare it with our previous results.

Materials and methods: The records of 160 patients who underwent parotidectomy at Jordan University Hospital from January 1990 to September 2014 were reviewed. A comparison of histopathological features between two interval periods (1990- 2006 & 2007- 2014) was done.

Results: The most common benign neoplasm was pleomorphic adenoma (46.6-50) %, followed by Warthin’s tumor (16-29) %. Warthin tumours represented 29% of benign parotid tumors in 2007- 2014 interval while it was 16 % in 1990-2006 interval with a significant difference statistically (p value 0.049).

Conclusion: Warthin’s tumor was seen more than expected, it exceeds the reports from other countries and our own report ten years ago giving the impression that it does not only vary geographically but also changes with time.